An Atomic Database for Spectroscopic Diagnostics of Astrophysical Plasmas.

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George Mason University (USA) - University of Michigan (USA) - University of Cambridge (UK)

CHIANTI consists of a critically evaluated set of up-to-date atomic data, together with user-friendly programs written in Interactive Data Language (IDL) and Python to calculate the spectra from astrophysical plasmas.

The CHIANTI package is freely available.
If you use the package, we only ask you to appropriately acknowledge CHIANTI .

- The Chianti wine-producing area of Tuscany, Italy -

CHIANTI Database Version 8.0 released, Sept 2015

Version 8 includes several new entries and revises the atomic data for many ions. In particular, for ions of the He-like, Li-like, B-like, Ne-like and Na-like isoelectronic sequences, plus several important coronal iron and nickel ions.

In addition, the method for computing the differential emission measure has been changed. Details can be found in Del Zanna et al. (2015), in press (see

Important note: for various reasons, it has been necessary to modify the format of the elvlc and splups files. The elvlc files have been restructured but retain the same name, while the splups files have been significantly revised and are now renamed as "scups" files. For both the updated elvlc and new scups files, an ascii fixed text width format has been retained. We have modified the CHIANTI software to read these new files, but all the main software is left unchanged.

The new database and IDL programs are incompatible with the previous CHIANTI versions and vice-versa.

We are grateful to individual scientists and funding agencies for their support.